Consider to cars traveling directly towards each other. car a has twice the mass of car b. in order for the cars to completely stop when they collide, which of the following is true? (remember, momentum = mass * velocity) car a should have twice the velocity of car b car b should have twice the velocity of car a car a should have 4x the velocity of car b car b should have 4x the velocity of car a

Complete the sentence to describe how light behaves as it relates to its nature (waves or particles). light travels as blank and interacts with matter as blank

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)